Make PDF Smaller (Free Online Tools)

1. Adobe Acrobat - Online PDF Editor

Adobe Acrobat Edit a PDF is an online PDF editor that helps you add text, drawings, images, sticky notes, and many more to PDF files. Its PDF editing tools allow you to add or remove text boxes with comments. You can annotate your PDF document with highlights, strikethrough, or underline text content. Adobe Acrobat provides a free drawing tool to draw anything like circles, arrows, and different shapes. It can be opened on any web browser, and converting PDF files to editable PDFs is super fast.

Adobe Acrobat

Following are the steps to edit and annotate PDFs:

1. Click on Select a File, or just drag & drop a PDF to edit.
2. Once the file is uploaded, sign in to edit.
3. Add text, drawings, and more to your PDF file.
4. Download your file or get a link to share.

2. SmallPDF

SmallPDF is an online PDF editor free tool that helps edit PDF files without any fuss. It helps you add and edit text, images, shapes, freehand drawings, highlights, add comments, and many more. It also allows you to fill in forms. It is a cloud-based platform, and files can be converted from any web browser. SmallPDF is a transparent platform and lets you know how they store, process, and collect personal data. It implements High-Tech TLS encryption to keep documents secure. You can also convert or create PDF files all on the SmallPDF platform.

SmallPDF

SmallPDF Editor provides an organize mode that helps to rearrange, merge, split, and extract text from PDF files. If the document is a scanned PDF, the SmallPDF PDF to Word converter can be used as it implements an OCR function for image text recognition.

3. Soda PDF

Soda PDF provides an online PDF editor tool to edit PDF documents. It helps change the order of PDF pages, and remove or add new pages. It provides other useful PDF editing options like page layout, margins, page size, and background. You can add text anywhere in the document with your desired font style. Soda PDF Editor helps add images or create images from a freehand drawing tool for visual appeal. You can align the images with text by using ruler and grid tools.

Soda PDF

4. DocFly - Online PDF Editor

DocFly is an online PDF editor that allows you to edit PDF files in cloud storage. It makes PDFs editable and allows you to add and remove text, highlight text, add images, add shapes, and freehand drawings within the document. The whiteout tool helps remove parts from the editable documents. You can add text boxes to insert new text or images wherever you want. All files are encrypted through secure HTTPS to protect and secure PDF documents. You can access your uploaded documents anytime and delete them if they are no longer needed.

DocFly

Prerequisites

To edit a PDF file and turn it into an editable PDF document, you will need the following prerequisites:

1. Visual Studio 2022
2. A .NET Console application running with the latest .NET Framework
3. A stable internet connection to download and install the IronPDF .NET library for PDF conversion.

Step 1: Add IronPDF

IronPDF can be downloaded and installed from Visual Studio NuGet package manager or the NuGet package manager console. Let's use the NuGet Package Manager Console method to install IronPDF.

Go to "Tools" in the menu toolbar and select the "Package Manager Console" option from NuGet Package Manager as shown in the figure below:

NuGet Package Manager

Step 2: Load PDF Files to Make PDF Editable

using IronPdf;

using IronPdf;

PdfDocument pdf = new PdfDocument("document.pdf");

PdfDocument pdf = new PdfDocument("document.pdf");

const int pageIndex = 1;
const string oldText = ".NET 6"; // Old text to remove
const string newText = ".NET 7"; // New text to add

// Replace Text on Page
pdf.ReplaceTextOnPage(pageIndex, oldText, newText);

const int pageIndex = 1;
const string oldText = ".NET 6"; // Old text to remove
const string newText = ".NET 7"; // New text to add

// Replace Text on Page
pdf.ReplaceTextOnPage(pageIndex, oldText, newText);

// Create a new PDF or load and edit an existing document.
var pdf = PdfDocument.FromFile("existing.pdf");

// Create a PDF annotation object
var annotation = new IronPdf.Annotations.TextAnnotation()
{
    Title = "This is the major title",
    Subject = "This is a subtitle",
    Contents = "This is the long 'sticky note' comment content...",
    Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotateable = true
};

// Add the annotation "sticky note" to a specific page and location within any new or existing PDF.
pdf.AddTextAnnotation(annotation, 1, 150, 250);

// Create a new PDF or load and edit an existing document.
var pdf = PdfDocument.FromFile("existing.pdf");

// Create a PDF annotation object
var annotation = new IronPdf.Annotations.TextAnnotation()
{
    Title = "This is the major title",
    Subject = "This is a subtitle",
    Contents = "This is the long 'sticky note' comment content...",
    Icon = IronPdf.Annotations.TextAnnotation.AnnotationIcon.Help,
    Opacity = 0.9,
    Printable = false,
    Hidden = false,
    OpenByDefault = true,
    ReadOnly = false,
    Rotateable = true
};

// Add the annotation "sticky note" to a specific page and location within any new or existing PDF.
pdf.AddTextAnnotation(annotation, 1, 150, 250);

Step 3: Save Editable PDF

Now it's time to save the PDF file on our system with a valid path. The SaveAs method is used to save the PDF file.

pdf.SaveAs("edited_pdf.pdf");

pdf.SaveAs("edited_pdf.pdf");

For more information about editing PDFs in C# using IronPDF, please visit the IronPDF C# PDF Editing Examples.